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ERROR L258: AJMP IN BANKTABLE OUT OF RANGE

Rudolf Waller

I’m working on application with bank switch. It was working fine up to last week. Then the code was bigger than code area and I must to reorganize modules on banks. It fits now, but LX51 shows:

*** ERROR L258: AJMP IN BANKTABLE OUT OF RANGE, CONFIGURATION ERROR IN L51_BANK.A51
START: 0000H
JMPSTART: 80041B0H

What a meanning of both information (START and JMPSTART)?

Manual shows:
There is a configuration error in the L51_BANK.A51 (banking configuration) file. Make sure that you are using the current version of this file. Also you should make not modifications to the PUBLIC symbols or segment names of that file.

I don’t understand what happens. I didn’t change L51_BANK.A51. It’s the same than last week.

I’m using on L51_BANK.A51:

?B_NBANKS       EQU  2
?B_MODE         EQU  4
?B_RTX          EQU  0
?B_VAR_BANKING  EQU  0
?B_RST_BANK     EQU  0x00

The MAP file shows:

START     STOP      LENGTH    ALIGN  RELOC    MEMORY CLASS   SEGMENT NAME
***   COMMON AREA   ***
000800H   000F2FH   000730H   PAGE   INBLOCK  CODE           ?BANK?SWITCH
…
0019B6H   0019C0H   00000BH   BYTE   UNIT     CODE           ?BANK?SELECT

I’m using 9.01 version and the areas used are:
COMMON: 0000H to 24FDH
CODE BANK 0: 2500H to F348H
CODE BANK 1: 2500H to 7C7FH

How can I correct this error?

Thanks for any help :)

  • 0

    there is a compiler/linker option NOAJMP which you will need to activate

    Erik

  • 0 in reply to erik malund

    Thanks for your reply, Erik.

    "there is a compiler/linker option NOAJMP which you will need to activate"

    Unfortunately the code doesn't fit on flash if I use NOAJMP.

    Is there other solutions?

    Why this error occurs on BANKTABLE?

  • 0 in reply to Rudolf Waller

    Unfortunately the code doesn't fit on flash if I use NOAJMP.

    then you are hosed anyway, when the inevitable feature creep happens what will you do?

    Erik

  • 0 in reply to Rudolf Waller

    Yes!

    Reviewed your code to see what opportunities exist to reduce its size?

    Or, Rather than fight what is, after all, a fundamental limitiation of the 8051 architecture - redirect your effort to porting the application to a more suitable platform...

  • 0 in reply to erik malund

    I don't know YET, but I must to do anything...

  • 0 in reply to Andy Neil

    "redirect your effort to porting the application to a more suitable platform..."

    The new version of this equipment is using MSP430, but I must to update firmware of thousand and thousand of 8051 one. Unfortunately...

    Well, about the problem, I think it would work if I could reduce bank table size. How can I do that?

    Table size is 0730H. I think isn’t big enough because almost all code is
    MOV DPTR,#xxx
    AJMP 0800H / 081BH

    I understand the bank table size can be up to 0FFFH (address 0800H to 0FFFH). After that AJMP doesn’t work. Why bank table size can’t expand?

    What a meanning of
    START: 0000H
    JMPSTART: 80041B0H

    How can I use those information in order to resolve the problem?

    I changed banks of some modules yesterday. It didn’t work, but I don’t understand why START and JMPSTART have the same values after that change.

    An idea: How can I tell to LX51 use LJMP on bank table instead AJMP?

    Thanks again